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Merge pull request #63 from corley/feature/query-manager
Support for custom query manager
2 parents dd30958 + a056cc2 commit 3dfc6c5

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‎README.md‎

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@@ -183,16 +183,6 @@ array(1) {
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}
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```
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## Database operations
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You can create, list or destroy databases using dedicated methods
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```php
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$client->getDatabases(); // list all databases
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$client->createDatabase("my-name"); // create a new database with name "my.name"
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$client->deleteDatabase("my-name"); // delete an existing database with name "my.name"
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```
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## Global tags and retention policy
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You can set a set of default tags, that the SDK will add to your metrics:
@@ -300,6 +290,75 @@ $connectionParams = array(
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$conn = \Doctrine\DBAL\DriverManager::getConnection($connectionParams, $config);
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```
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## Database operations and custom queries
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The class `InfluxDB\Client` does not support any database operation by itself.
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That means that you don't have any helper function for create new databases, or
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list actual databases and so on.
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Thanks to `InfluxDB\Manager` you can use a preset of queries and create your own
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personal queries that will run against the Influxdb instance.
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### Create the manager
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The `Manager` instance is very simple, you have to create it with a client
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instance.
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```php
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$manager = new Manager($client); // InfluxDB\Client instance
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```
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### Attach new queries
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The manager allows to attach new queries via an helper method `addQuery`.
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```php
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$manager->addQuery("getExceptionsInMinutes", function($minutes) {
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return "SELECT * FROM app_exceptions WHERE time > now() - {$minutes}m";
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});
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$manager->getExceptionsInMinutes(10); // The callable name
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```
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As you can see you have to label your anonymous function and reuse it via the
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manager.
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In order to collect and reuse custom queries you can define query objects:
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```php
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class GetExceptionsInMinutes
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{
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public function __invoke($minutes)
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{
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return "SELECT * FROM app_exceptions WHERE time > now() - {$minutes}m";
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}
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public function __toString()
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{
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return "getExceptionsInMinutes";
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}
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}
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$manager->addQuery(new GetExceptionsInMinutes());
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$manger->getExceptionsInMinutes(10); //Use the query
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```
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As you can see valid query command should be `callable` via the `__invoke`
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method and should be also serializable as strings via `__toString` method
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### Existing queries
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This project comes out with a preset of valid queries:
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* Create new database `InfluxDB\Query\CreateDatabase`
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* Drop existing databases `InfluxDB\Query\DeleteDatabase`
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* List existing databases `InfluxDB\Query\GetDatabases`
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```php
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$manager->addQuery(new CreateDatabase());
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$manager->addQuery(new DeleteDatabase());
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$manager->addQuery(new GetDatabases());
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```
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## FAQ
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‎src/Client.php‎

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@@ -45,22 +45,4 @@ public function query($query)
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{
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return $this->getReader()->query($query);
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}
48-
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public function getDatabases()
50-
{
51-
@trigger_error('The '.__METHOD__.' method is deprecated since version 0.8.1 and will be removed in 0.9.', E_USER_DEPRECATED);
52-
return $this->query("show databases");
53-
}
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public function createDatabase($name)
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{
57-
@trigger_error('The '.__METHOD__.' method is deprecated since version 0.8.1 and will be removed in 0.9.', E_USER_DEPRECATED);
58-
return $this->query("create database \"{$name}\"");
59-
}
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public function deleteDatabase($name)
62-
{
63-
@trigger_error('The '.__METHOD__.' method is deprecated since version 0.8.1 and will be removed in 0.9.', E_USER_DEPRECATED);
64-
return $this->query("drop database \"{$name}\"");
65-
}
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}

‎src/Manager.php‎

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<?php
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namespace InfluxDB;
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use InvalidArgumentException;
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use RuntimeException;
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use InfluxDB\Client;
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class Manager
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{
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private $client;
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private $queries;
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public function __construct(Client $client)
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{
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$this->client = $client;
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$this->queries = [];
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}
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public function addQuery($name, callable $query = null)
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{
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if ($query === null) {
22+
list($name, $query) = $this->fromObjectToNameCallableList($name);
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}
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$this->queries[$name] = $query;
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}
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private function fromObjectToNameCallableList($name)
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{
30+
if (is_object($name) && is_callable($name)) {
31+
if (method_exists($name, "__toString")) {
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return [(string)$name, $name];
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}
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}
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throw new InvalidArgumentException("Your command should implements '__toString' method and should be a callable thing");
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}
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public function __call($name, $args)
40+
{
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if (method_exists($this->client, $name)) {
42+
return call_user_func_array([$this->client, $name], $args);
43+
}
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if (array_key_exists($name, $this->queries)) {
46+
$query = call_user_func_array($this->queries[$name], $args);
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return $this->client->query($query);
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}
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throw new RuntimeException("The method you are using is not allowed: '{$name}', do you have to add it with 'addQuery'");
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}
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}

‎src/Query/CreateDatabase.php‎

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<?php
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namespace InfluxDB\Query;
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class CreateDatabase
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{
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public function __invoke($name)
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{
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return "CREATE DATABASE \"" . addslashes($name) . "\"";
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}
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public function __toString()
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{
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return "createDatabase";
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}
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}

‎src/Query/DeleteDatabase.php‎

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<?php
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namespace InfluxDB\Query;
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class DeleteDatabase
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{
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public function __invoke($name)
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{
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return "DROP DATABASE \"" . addslashes($name) . "\"";
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}
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public function __toString()
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{
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return "deleteDatabase";
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}
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}
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‎src/Query/GetDatabases.php‎

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<?php
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namespace InfluxDB\Query;
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class GetDatabases
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{
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public function __invoke()
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{
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return "show databases";
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}
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public function __toString()
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{
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return "getDatabases";
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}
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}
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‎tests/integration/ClientTest.php‎

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$this->assertValueExistsInSerie("tcp.test", "tt", "mem", 2);
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}
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73-
public function testListActiveDatabases()
74-
{
75-
$options = new Options();
76-
$guzzleHttp = new GuzzleHttpClient();
77-
$writer = new Writer($guzzleHttp, $options);
78-
$reader = new Reader($guzzleHttp, $options);
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$client = new Client($reader, $writer);
80-
81-
$databases = $client->getDatabases();
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83-
$this->assertCount(2, $databases["results"][0]["series"][0]["values"]);
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}
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86-
public function testCreateANewDatabase()
87-
{
88-
$options = new Options();
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$guzzleHttp = new GuzzleHttpClient();
90-
$writer = new Writer($guzzleHttp, $options);
91-
$reader = new Reader($guzzleHttp, $options);
92-
$client = new Client($reader, $writer);
93-
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$client->createDatabase("walter");
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$databases = $client->getDatabases();
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98-
$this->assertCount(3, $databases["results"][0]["series"][0]["values"]);
99-
}
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101-
public function testDropExistingDatabase()
102-
{
103-
$options = new Options();
104-
$guzzleHttp = new GuzzleHttpClient();
105-
$writer = new Writer($guzzleHttp, $options);
106-
$reader = new Reader($guzzleHttp, $options);
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$client = new Client($reader, $writer);
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$client->createDatabase("walter");
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$this->assertDatabasesCount(3);
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$client->deleteDatabase("walter");
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$this->assertDatabasesCount(2);
114-
}
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/**
11774
* Test that we handle socket problems correctly in the UDP
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* adapter, and that they don't inturrupt the user's application.

‎tests/integration/Framework/TestCase.php‎

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use GuzzleHttp\Client as GuzzleHttpClient;
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use InfluxDB\Client;
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use InfluxDB\Manager;
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use InfluxDB\Adapter\Http\Options as HttpOptions;
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use InfluxDB\Adapter\Http\Writer;
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use InfluxDB\Adapter\Http\Reader;
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use InfluxDB\Query\CreateDatabase;
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use InfluxDB\Query\DeleteDatabase;
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use InfluxDB\Query\GetDatabases;
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1014
class TestCase extends \PHPUnit_Framework_TestCase
1115
{
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1923
$writer = new Writer($guzzleHttp, $options);
2024
$reader = new Reader($guzzleHttp, $options);
2125

22-
$client = $this->client = new Client($reader, $writer);
26+
$client = $this->client = new Manager(new Client($reader, $writer));
27+
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$client->addQuery(new CreateDatabase());
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$client->addQuery(new DeleteDatabase());
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$client->addQuery(new GetDatabases());
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2432
$this->dropAll();
2533
}
@@ -78,7 +86,12 @@ public function assertSerieExists($database, $serieName)
7886
public function assertDatabasesCount($count)
7987
{
8088
$databases = $this->client->getDatabases();
81-
$this->assertCount($count, $databases["results"][0]["series"][0]["values"]);
89+
$databaseList = [];
90+
if (array_key_exists("values", $databases["results"][0]["series"][0])) {
91+
$databaseList = $databases["results"][0]["series"][0]["values"];
92+
}
93+
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$this->assertCount($count, $databaseList);
8295
}
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public function getOptions()

‎tests/integration/ManagerTest.php‎

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<?php
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namespace InfluxDB\Integration;
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use InfluxDB\Adapter\Http\Options;
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use InfluxDB\Adapter\Http\Writer;
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use InfluxDB\Adapter\Http\Reader;
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use InfluxDB\Client;
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use InfluxDB\Query\CreateDatabase;
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use InfluxDB\Query\DeleteDatabase;
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use InfluxDB\Query\GetDatabases;
11+
use GuzzleHttp\Client as GuzzleHttpClient;
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use InfluxDB\Manager;
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use InfluxDB\Integration\Framework\TestCase;
14+
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class ManagerTest extends TestCase
16+
{
17+
public function testCreateANewDatabase()
18+
{
19+
$options = new Options();
20+
$guzzleHttp = new GuzzleHttpClient();
21+
$writer = new Writer($guzzleHttp, $options);
22+
$reader = new Reader($guzzleHttp, $options);
23+
$client = new Client($reader, $writer);
24+
$manager = new Manager($client);
25+
26+
$manager->addQuery(new CreateDatabase());
27+
$manager->addQuery(new DeleteDatabase());
28+
$manager->addQuery(new GetDatabases());
29+
30+
$manager->createDatabase("one");
31+
$manager->createDatabase("two");
32+
$manager->createDatabase("walter");
33+
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$databases = $manager->getDatabases();
35+
36+
$this->assertCount(3, $databases["results"][0]["series"][0]["values"]);
37+
}
38+
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public function testDropExistingDatabase()
40+
{
41+
$options = new Options();
42+
$guzzleHttp = new GuzzleHttpClient();
43+
$writer = new Writer($guzzleHttp, $options);
44+
$reader = new Reader($guzzleHttp, $options);
45+
$client = new Client($reader, $writer);
46+
$manager = new Manager($client);
47+
48+
$manager->addQuery(new CreateDatabase());
49+
$manager->addQuery(new DeleteDatabase());
50+
$manager->addQuery(new GetDatabases());
51+
52+
$manager->createDatabase("walter");
53+
$this->assertDatabasesCount(1);
54+
55+
$manager->deleteDatabase("walter");
56+
$this->assertDatabasesCount(0);
57+
}
58+
59+
public function testListActiveDatabases()
60+
{
61+
$options = new Options();
62+
$guzzleHttp = new GuzzleHttpClient();
63+
$writer = new Writer($guzzleHttp, $options);
64+
$reader = new Reader($guzzleHttp, $options);
65+
$client = new Client($reader, $writer);
66+
$manager = new Manager($client);
67+
68+
$manager->addQuery(new CreateDatabase());
69+
$manager->addQuery(new DeleteDatabase());
70+
$manager->addQuery(new GetDatabases());
71+
72+
$manager->createDatabase("one");
73+
$manager->createDatabase("two");
74+
75+
$databases = $manager->getDatabases();
76+
77+
$this->assertCount(2, $databases["results"][0]["series"][0]["values"]);
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}
79+
}

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